Genero BDL Tutorial 3.10

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  • How to write an application in Genero BDL
    • Testing the Example Programs
    • Tutorial Chapters
  • Tutorial Chapter 1: Overview
    • Overview
    • The BDL Language
    • The BDL Tutorial
    • The Example Database (custdemo)
    • The Sample Data
  • Tutorial Chapter 2: Using BDL
    • A simple BDL program
    • Compiling and Executing the Program
    • Debugging a BDL Program
    • The "Connect to database" Program
      • Example: connectdb.4gl
  • Tutorial Chapter 3: Displaying Data (Windows/Forms)
    • Application Overview
    • The .4gl File - Opening Windows and Forms
    • The .4gl File - Interacting with the User
    • The .4gl File - Retrieving and Displaying Data
    • Example: dispcust.4gl (function query_cust)
    • The Form Specification File
    • Example: Form Specification File custform.per
    • Compiling the Program and Form
  • Tutorial Chapter 4: Query by Example
    • Implementing Query-by-Example
      • Steps for implementing Query-by-Example
      • Using CONSTRUCT and STRING variables
      • Preparing the SQL Statement
    • Allowing the User to Cancel the Query Operation
      • Predefined Actions (accept/cancel)
      • DEFER INTERRUPT and the INT_FLAG
      • Conditional Logic
        • The IF statement
        • The CASE statement
      • The Query program
        • Example: Module custmain.4gl
        • Example: Module custquery.4gl
        • Example: custquery.4gl (Function get_cust_cnt)
    • Retrieving data from the Database
      • Using Cursors
      • The SQLCA.SQLCODE
      • Example custquery.4gl (function cust_select)
      • Example: custquery.4gl (function fetch_cust)
      • Example: custquery.4gl (function fetch_rel_cust)
      • Example: custquery.4gl (function display_cust)
    • Compiling and Linking the Program
    • Modifying the Program to Handle Errors
      • The WHENEVER ERROR statement
      • Negative SQLCA.SQLCODE
      • SQLERRMESSAGE
      • Close and Free the Cursor
      • Error if Cursor is not Open
  • Tutorial Chapter 5: Enhancing the Form
    • Adding a Toolbar
      • Example: (in custform.per)
    • Adding a Topmenu
      • Example ( in custform.per)
    • Adding a COMBOBOX form item
    • Changing the Window Appearance
    • Example: (in custform.per)
    • Example: (in custmain.4gl)
    • Managing Actions
      • Disable/Enable Actions
      • The Close Action
    • Example: (custmain.4gl)
    • Action Defaults
    • MENU/Action Defaults Interaction
    • Images
  • Tutorial Chapter 6: Add, Update and Delete
    • Entering data on a form: INPUT statement
      • UNBUFFERED attribute
      • WITHOUT DEFAULTS attribute
    • Updating Database Tables
      • SQL transactions
      • Concurrency and Consistency
    • Adding a new row
      • INPUT Statement Control blocks
      • Example: add a new row to the customer table
      • Module custmain.4gl
      • Module custquery.4gl (function inpupd_cust)
      • Module custquery.4gl (function insert_cust)
    • Updating an existing Row
      • Using a work record
      • SELECT ... FOR UPDATE
      • SCROLL CURSOR WITH HOLD
      • Example: Updating a Row in the customer table
      • Module custquery.4gl
    • Deleting a Row
      • Using a dialog Menu to prompt for validation
      • Example: Deleting a Row
  • Tutorial Chapter 7: Array Display
    • Defining the Form
      • Screen Arrays
      • TABLE Containers
      • The INSTRUCTIONS section
      • Form example: manycust.per
    • Creating the Function
      • Program Arrays
      • Loading the Array: the FOREACH Statement
    • The DISPLAY ARRAY Statement
      • The COUNT attribute
      • The ARR_CURR function
      • Example Library module: cust_lib.4gl
    • Paged Mode of DISPLAY ARRAY
      • What is the Paged mode?
      • AFTER DISPLAY block
      • Example of paged mode
    • Compiling and using a Library
      • Example: cust_stub.4gl
  • Tutorial Chapter 8: Array Input
    • The INPUT ARRAY statement
    • WITHOUT DEFAULTS clause
    • The UNBUFFERED attribute
    • COUNT and MAXCOUNT attributes
    • Control Blocks
    • Built-in Functions - ARR_CURR
    • Predefined actions
    • Example: Using a Screen Array to modify Data
      • The Form Specification File
      • The Main block
      • Function load_custall
      • Function inparr_custall
      • Function store_num_ok
      • Function insert_cust
      • Function update_cust
      • Function delete_cust
  • Tutorial Chapter 9: Reports
    • BDL Reports
    • The Report Driver
    • The Report Definition
      • The DEFINE section
      • The OUTPUT section (optional)
      • The ORDER BY section (optional)
      • The FORMAT section
    • Two-pass reports
    • Example: Customer Report
      • The Report Driver
      • The Report Definition
    • Interrupting a Report
      • The interrupt action view
      • Refreshing the Display
      • Using a ProgressBar
    • Example: Interruption Handling
      • The Form Specification File
      • Modifications to custreports.4gl
      • The cust_report function
  • Tutorial Chapter 10: Localization
    • Localization Support
    • Localized Strings
    • Programming Steps
    • Strings in Sources
    • Extracting Strings
    • Compiling String Source Files (fglmkstr)
    • Deploying String Files
    • Example: Localization
      • form.per - the form specification file
      • prog.4gl - the program module
      • Compiling the program
  • Tutorial Chapter 11: Master/Detail
    • The Master-Detail sample
    • The Makefile
    • The Customer List Module
    • The Stock List Module
    • The Master-Detail Form Specification File
    • The Orders Program orders.4gl
      • The MAIN program block
      • Function setup_actions
      • Function order_new
      • Function order_insert
      • Function order_query
      • Function order_fetch
      • Function order_select
      • Function order_fetch_rel
      • Function order_total
      • Function order_close
      • Function items_fetch
      • Function items_show
      • Function items_inpupd
      • Function items_line_total
      • Function item_insert
      • Function item_update
      • Function item_delete
      • Function get_stock_info
  • Tutorial Chapter 12: Changing the User Interface Dynamically
    • Built-in Classes
    • Working with Forms
    • Hiding Form Items
    • Adding toolbars, topmenus, and action defaults
    • Specifying a Function to Initialize all Forms
    • Loading a ComboBox List
    • Using the Dialog class in Interactive Statements
    • Hiding Default Action Views
    • Enabling and Disabling Fields
    • Using the Interface Class
  • Tutorial Chapter 13: Master/Detail using Multiple Dialogs
    • The Master-Detail sample
    • The Customer List Form
    • The Customer List Module
    • The Orders Form
    • The Orders Program orders.4gl
      • Module variables of orders.4gl
      • Function orditems_dialog
      • Function order_update
      • Function order_new
      • Function order_validate
      • Function order_query
  • Copyrights and Trademarks